Large nonlinear Kerr effect in graphene

  title={Large nonlinear Kerr effect in graphene},
  author={Han Zhang and St{\'e}phane Virally and Qiaoliang Bao and Kian Ping Loh and Serge Massar and Nicolas Godbout and Pascal Kockaert},
  journal={arXiv: Optics},
Under strong laser illumination, few-layer graphene exhibits both a transmittance increase due to saturable absorption and a nonlinear phase shift. Here, we unambiguously distinguish these two nonlinear optical effects and identify both real and imaginary parts of the complex nonlinear refractive index of graphene. We show that graphene possesses a giant nonlinear refractive index n2=10-7cm2W-1, almost nine orders of magnitude larger than bulk dielectrics. We find that the nonlinear refractive… 

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